Stop mechanism.



D. VV. WOOD. STOP MECHAMISM.

AFPLlCATiON FILED JAN-4, 191.7- 1,2459553@ Patented Novu 6, 19N.

mw @2% f@ D. W. WOOD.

STOF MECHANISM.

APPLICATION FILED IAN.4.I9I1.

l 45,653, Patented Nov. 6,191?.

3 SHEETS-SHEET 2.

WTNESSES E Bmwmmm v ,Imm/Ins D. W. W-OOB.

STOP MECHANISM.

APPLICATION FILED 1MM. I9I7.

Patented Nov. 6, v1917.

3 SHEETS-SHEET 3.

DAVID IVILSON W'OOD, OF BRAZIL, INDIANA.

STO? MECHANISM.

Speccation of Lettersy Patent. Y

Patented Nov. e, 1917.

Application filed January 4,1917. Serial No. 140,613.

To @ZZ whom t may concern:

Be it known that I, DAVID WILSON Wool?,

a citizen ofthe United States, and a resident of Brazil, in the county of Clay and v tion of the stop mechanism as applied to a State of Indiana, have invented a new and Improved Stop Mechanism, of which the following is a full, clear, and exact description.

The invention relates to lathes, drill presses, milling machines and similar` machines using a turret head and stop rods.

The obj ect of the invention is to provide a new. and improved stop mechanism for machines of the type referred to and arranged to insure automatically a positive stopping of the turret slide andy its turret head according to the predetermined feed intended to be given to the turret head. A11- other obj ect is to positively unlocktheturret head immediately prior to turning it in unison with the revoluble head carrying the stop rods. Another object is to permit of turning the stop rod by hand and independent of the turret head in order tomove the stops in correct relation to the turret head in caseA the latter had been removed and then replaced.

In order to produce the desired result,

use is made of a bearing for the driving worm shaft pivoted at one end, a resetting hand lever provided with a supporting member for supporting the free end of the said bearing, a tripping shaft having two arms, of which one is connected by a link with the said resetting lever and the other is adapted to be engaged by a tripping pin mounted to slide and adapted to be engaged by the stop rod in active position at the time. Use is also made of a locking pin engaging one of a series of holes in the bottom of the turret head, a lever engaging the said pin and fulcrumed on the turret slide, a Xed cam adapted to be engaged by the said lever to withdraw the lookin g pin from the turret head, a lined tooth, a toothed wheel adapted to engage the said iXed tooth immediately after the locking pin is withdrawn, and gearing turning with theV said toothed wheel and connected with the turret head and with the head carrying the stop rods, to rotate the turret head and the Vstop rod head in unison. U y

A practical embodiment of the` invention is represented in the` accompanying drawings fo'rming 'a part of this specification, in

which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal sectional elevaturret lathe;

Fig. 2 is a similar view of the same and reciprocate the same;

Fig. 3 is an invertedY plan view of the turret slide;`

Fig. 4 is a plan view ofthe bed of the lathe or other machine on which the stop mechanism'is applied;

Fig. 5 is a sectional side elevation Yofthe turret head mounted to turn on the turret slide;v Y Y 4 Fig. 6 is an inverted sectional plan: view 0f the turret head on the lineG- of Fig. 1; and l l Y Fig. 7 is a rear end elevation of the machine' bed, the turret slide and the head of tools in the usual manner. rIn order toy impart 'a forward and backward sliding movement to the turret slide 1'1 use is made of a rack 13 attached' tothe turret slide 11 and extending lengthwise thereof. A pinion 14 is in mesh with-the rack,13and is secured on a transversely extending shaft 15 journaled in suitable bearings arranged on the bed 10. On the shaft 15 is secured a worm wheel 16 V(see Fig. 2) in mesh with a worm 17 secured on a wormy shaft 18 journaled in a' bearing 19 fulcrumedr on a transverse pivot 20 held on the bed 10. The free end of the bearing 19 is provided with a pin 21 normally resting onV the lower end 22 of a supporting member 23 preferably in the form of a link liungloosely on a pivot 24 mounted on the bed 10. A spring 25 presses the supporting member 23 to hold the latter in position for supporting the pin 21 of the bearing' 19 so that `the worm 17 is normally in mesh with its worm wheel 16. The supporting member 23 is adapted to be engaged by a lug 30 held on the lower end 31 of a resetting lever 32 fulcrumed on the pivot 24C and extending upwardly within convenient reach of the operator in charge of the lathe.

rlhe resetting lever 82 is connected by a linl; 33 with an arm secured on a tripping shaft- 35 extending transversely and journaled in suitable bearing arranged on the bed 10. Gn the shaft 35 is secured a second arm 36 (see Fig. 1) adapted to be engaged by the forward end of a pin 37 mounted to slide lengthwise in a` bearing 8S attached to or forming part of the bed 10. The rear end of the pin 37 is provided with a head 39 adapted to be engagedv by any one of the stop rods -lO in act-ive position at the time. The worm shaft 18 is provided with a gear wheel il5 connected in the usual manner with the feed shaft @t6 of the lathe or other machine on which the stop mechanism is used so that the worm shaft 18 is rotated in either direction in the usual manner.

`When the several parts are in the position shown in Figs. 1 and 2, and the slide 11 is caused to slide forward and backward in the direction of the arrow a. then the corresponding tool in the turret head 12 is fed to the work and when this tool has accomplished its function then the corresponding stop rod Ll0 moves with its forward end in engagement with the head 39 of the pin 37 to move the latter for rvard in its bearing 3S. The forward movement given to the pin 37 causes the forward swinging of the arm 3G whereby the tripping shaft is turned and its other arm 3e pulls on the linl; 33 whereby a forward swinging movement is given to the resetting lever 32. The. movement given to the lever 32 causes the lug BO to move in engagement with the spring-pressed supporting member 23whereby the latter is swung to the right and out of engagement 1vith the pin 21 to allow the bearing 19 to swing downward by its own weight so that the worm 1T moves out of mesh with the worm wheel 16. llVhen this takes place further forward feeding of the turret slide 11 in the direction of the arrow (a ceases although the worm shaft 18 is still rotating'. After the worm shaft 18 is reversed the operator imparts a return movement to the resetting lever 32 which latter is provided at its lower end 31 with an incline e7 engaged by a pin i8 held on the free end of the bearing 19. 'it is understood that during the automatic swinging movement of the resetting lever 32 to the leftas previously explained the pin S travels down the incline el? and when the resetting lever is swung to the right by the operator then the incline l? acts on the pin /18 whereby the bearing 19 is swunff upward and the worm 17 is reengaged with the worm wheel 1G. As the worm wheel 1T new rotates in the reverse direction it is evident that a return sliding movement is given to the turret slide 11 in the inverse direction of the arrow a.

lt is understood that the shaft 15 extends to the front of the machine and is provided at this end with the usual wheel or handle (not shown) to permit the operator to turn the shaft 15 whenever it is desired to feed the turret slide 11 forward or backward by hand for any reason whatever.

rllhe turret head 12 is provided at its under side with a series of apertures 50 arranged in a circle (see (i) and adapted to be successively engaged by a locking pin 51 mounted to slide in a suitable bearing on the slide 11 and pressed at its` bottoni by a spring 52 to normally held the pin .31 in engagement with one of the apertures 50. The pin 51 is engaged by the forward end'of a lever 53 fulcruined at on the slide'117 and the said lever is provided at its rear end with an inclined cam 5% adapted to engage a member lixed on the bed 10. The fixed member 55 is so arranged that when the turret slide 11 moves into rearward posit-ion then the cam of the lever 53 engages Athe member 55 whereby a swinging movement is given to the lever 53 and the locking Apin l'is withdrz'twn from the corresponding aperture 50 of the turret head 12 thus unlocking the latter. immediately after the turret head 12 is unlocked a turning movement is given to the turret head and for this purpose the followinO arrangement is made: On the bed 10 is arranged a pivot 60 on which is fulerumed an' arm G1 engaged by a screw 62 held on the bed 10 for adjusting the arm 61 in an up and down direction. The arm 61 is pro f'ided with an upwardly and forwardly extending tooth 3B adapted to successively engage the teeth of a toothed wheel tS-l provided with as many teeth as the turret head 12 is provided with tools. The toothed wheel 6-1 is secured on a tran. yerse shaft 65 journaled in'suitable bearings arranged on the turret slid@ 11, and on the sad shaft 65 is secured a bevel gear wheel'tll in csh with a bevel gear wheel (37 mounted to turn on a shaft 68 journaled in suitable bearings arranged on the turret slide ll, as plainlv indicated in Fig. 5. 'i

rlhc axis of the shaft G8 extends parallel to the pivot G9 of the turret head 12 and on the bevel gear wheel Si' is secured or formed a gear wheel 70 in mesh with a gear wheel 71 attached to the under side of the turret head 12. lVhen the turret slide 11 moves into rearmost position then the toothed wheel nieves in engagement with the fixed tooth 63 immediately after the lock-pin 51 has been withdrawn, as above explained. and then a turning movement is given to the toothed wheel Get whereby the shaft G5 is rotated and with it the bevel gear wheel GG. The rotarymoother tool vinto active position for thel next,

following operation. 1t is understood that by adjusting the arm 61 up or down the tooth 63 can be moved in proper relation relative to the tooth of the toothed wheel p '64 to insure proper turning of the turret head 12, as above explained, and at the time l the slide 11 moves into final rearmost'position.

The bevel gear wheel 66 above described is also in mesh with a bevel gear wheel S0 attached to vthe ferr-.Yard end ofa shaft S1 carrying the head S2 in which the stop rods 40 are screwed. rPhe head 82 is clamped between a collar 83 secured on the shaft 81 and a nut Set screwing on the outer end of the shaft 81. IThe head 82 is mountedv to turn in a bearing, part of which is formed in the outer end of the slide 11 as indicated at 85, and the other part of the bearing is in the form of a ring 86 fastened by screws S7 to the bearing part 85. The peripheral face of the head 82 is provided with an annular rib S8 fitting into acorresponding rabbet formed in the ring 86. On the righthand end of the head S2 is fitted a ring 90 fastened by set screws 91 (see Fig. 7 to the head 82, and in the ring 90 screw set screws 92 against the stop rods 4:0 so as to lock the latter in place after proper adjustment of the same has been made. lVhen the machine is running, as previously ex? plained, and a turning movement is given to the toothed wheel 64e then the shaft S1 is turned owing to its gear wheel 80 being in mesh with the gear wheel 66, and the rotary motion of the shaft S1 causes a turning of the head 82 whereby another stop rod ll0 is moved into active position.

1t will be noticed that in case the turret head 12 is removed from the slide 11 for repairs or other purposes and is then replaced it may be necessary to reset the stop rod head 82, and for this purpose it is only7 necessary to loosen the nut 84 to permit of turning the head 82 in its bearings 85 and 86 until the stops are in proper relation relative to the tool in the turret head 12.

From the foregoing it will be seen that y the arrangement described a positive stopping of the turret slide isautomatically had as soon as the corresponding tool in the turret head 12 has perfomed its work. It will also be noticed that when the turret slide 11 moves back into rearmost position the turret head 12 is automatically unlocked by withdrawing the pin 51 from the corresponding aperture 50 and immediately thereafter a turning movement is given to the toothed wheel 64. by the latter coming in contact with the lXed tooth 63 so that the turret head 12 is turned the desired distance and in unison with itV turns the head S2 carrying the stop rods 40 sothat the next tool and the corresponding stop rodl 40 move into activepos'it'ion. p A

vHaving'thus described my-invention, I

claim as new and desire to secure by Letters Patent 1. Ina stop mechanism ofv the Vclass described, a turret slide stop head revolublyH mounted at its front end and `provided with stops adjustably held' therein, a tripping pin longitudinally slidable ina fined bearing and adapted to be engagedby oneof the I v the time, a tripping shaft carrying two arms,'of which one stops in active position at is adapted to Vbe engaged by the said pin, a resetting lever, a link connecting the said resetting lever with th'e second arm on -the said shaft, a driven worm, a bearing for the said worm and pivoted at one end, 'aVv worm wheel in mesh with the said worm and geared with the said turret slide, and a supporting member controlled by the said resetting lever and normally supporting the free end of the said bearing.

2. In a stop mechanism of the class described, a turret slide having a revoluble stop head provided with stops, a tripping pin slidable in a fixed bearing and adapted to be engaged by one of the stops 'in active position at the time, a tripping shaft'carrying two arms, of which one is adapted to be engaged by the said pin, a resetting lever, a link connecting the said resetting lever with the second arm on the said shaft, the said resetting lever having an incline, a spring-pressed pivoted supporting member adapted to be engaged by the said resetting lever, a bearing pivoted at one end on the slide and seated at its other end on the said incline and the supporting member, a driven worm shaft journaled in the said bearing and carrying a worm, a worm wheel in mesh with the said worm, a worm wheel shaft carrying the said worm wheel and journaled on the slide, a pinion on the said worm wheel shaft, and a rack on the said slide and engaged by the said pinion.

3. In a stop mechanism of the class described, a bed, a turret slide mounted thereon and carrying a turret head, a stop head revolubly mounted at the front end of said slide and carrying stops, a locking pin engaging the said turret head to hold the latter against turning, a lever controlling the said pin, a fixed member adapted to engage the said lever on the return movement of the slide to withdraw the said locking pin from the turret head, an adjustable arm fulcrumed on the bed, a fixed tooth carried by said arm, a toothed wheel adapted to engage the said fiXed tooth immediately after the said locking pin is withdrawn, a shaft `iournaled on the said turret slide and carrying the said toothed wheel, and gearing connecting the said shaft with the said turret head and With the stop head to rotate the Asame in unison.

d. In a stop mechanism for turret machines, a turret slide, a turret headmounted to turn on the said turret slide, a stop head mounted to turn in the said slide and provided with an annular exterior shoulder, a shaft provided with a collar and ay nut and between which the said head is clamped, a bearing ring,` attached to the said slide and engaging the said head and its shoulder, a collar on the said head and abutting against the said bearing ring', and set screws screwing in the said collar and against the stops held in the stop head.

5. In a stop mechanism of the class described, a turret slide carrying a turret head, a stop head revolubly mounted at the Atrent end of said slide and carryingstops, a locking pin engaging said turret head to hold the latter against turning, a lever controlling said pin, the forward end of said lever being beveled, a rigid member adapted to engage the beveled end of said lever on return movement yof the slide to Withdraw .said locking pin from the turret head, an

adjustable arm, a ytooth carried by Said arm, a toothed Wheel adapted to engage the said tooth immediately subsequent to Withdrau'al or' locking pin, a shaft on the turret slide and carrying` said toothed Wheel, and gear connections between said shaft and turret head and with the stop head to cause the same to rotate in unison.

DAVID VILSON l/VOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

